signature_field_renderer.inc

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<?php
require_once realpath(dirname(__FILE__))."/../field_renderers.inc";
 
class SignatureFieldRenderer extends StringFieldRenderer
{
     var $errorMessage = "Your signature does not match your password. Please try again.";
     
     var $password = true;                   
     var $autocomplete = false;              
     var $signatureField = "password";  
     
     function SignatureFieldRenderer(&$parent)
     {
          $this->StringFieldRenderer($parent);
          $this->password = true;
          $this->autocomplete = false;
     }
 
     function addValidatorsToForm($field, $required = false)
     {         
          $label = isset($this->label) ? $this->label : $this->parent->prettifyFieldName($field);
          
          $this->parent->validator->add(new SignatureValidator($field, $label, $this->errorMessage, $this->signatureField));
          if ($required)
          {
               $this->parent->validator->add(new RequiredValidator($field, $label));
          }
     }
     
     function setSignatureField($signatureField, $errorMessage)
     {
          $this->signatureField = $signatureField;
          $this->errorMessage = $errorMessage;
     }
     
     function renderField($field = "")
     {
          if ($this->parent->msg)
          {
               //Clear out field if the form is in error, to force user to re-enter
               $this->parent->data->set($field, '');
          }
          
          if ($this->parent->data->get($field))
          {
               $this->renderReadOnly($field);
          }
          else
          {
               parent::renderField($field);
          }
     }
     
     function renderReadOnly($field = "")
     {
          if (!$field) $field = $this->field;
          $value = $this->parent->data->get($field);
          list($signature,$date,$user_id) = explode(":", $value);
          
          if ($user_id)
          {
               try
               {
                    $mgr = new UserManager();
                    $u = $mgr->getUser($user_id);
                    $msg = "Signed by ".$mgr->getUserFullName($u)." on $date";
               }
               catch(Exception $e)
               {
                    $msg = "Invalid Signature";
               }
          }
          else
          {
               $msg = "Not signed";
          }
          
          $this->_startField($field);
 
          echo $msg;
          
          $this->_endField($field);
     }
     
     function preProcess($field = "")
     {
          global $user;
          
          if (!$_POST[$field]) return;
          
          $obj = $this->parent->data;
          if ($this->signatureField == "password")
          {
               $obj->set($field, $user->hashPassword($_POST[$field]).":".today().":".$user->get($user->getPrimaryKey()));
          }
          else
          {
               $obj->set($field, $_POST[$field]).":".today().":".$user->get($user->getPrimaryKey());
          }
     }
}